Import llvm-lipo from build 7035838

lipo on the build server is too old to recognise arm64e. We will bundle
llvm-lipo in clang prebuilts in future builds, but right now we need to
retroactively add llvm-lipo to clang-r399163b for bootstrapping arm64e
support.

Test: N/A
Change-Id: Ie63bf091248c1bf067d073abbb7b2774a1218ab6
1 file changed